Stadium: Hard Court 3 Round: 25 Ground: Hardcourt outdoor
| Challenger Bergamo Qual | 2018/02/18 10:50 | Marc Sieber v Yannick Jankovits | 2-6,6-3,3-6 |
| Challenger Bergamo Qual | 2018/02/17 12:00 | Daniel Masur v Marc Sieber | 3-6,3-6 |
| Challenger Budapest Qual | 2018/02/04 11:30 | Marc Sieber v Alessandro Bega | 7-6,0-6,5-7 |
| Challenger Budapest Qual | 2018/02/03 08:30 | Jurabek Karimov v Marc Sieber | 1-6,3-6 |
| ITF Turkey F3 | 2018/01/26 09:30 | Dimitar Kuzmanov v Marc Sieber | 2-6,7-5,7-5 |
| ITF Turkey F3 | 2018/01/25 10:00 | Timur Kiyamov v Marc Sieber | 6-4,1-6,3-6 |
| ITF Turkey F3 | 2018/01/23 09:55 | Mubarak Shannan Zayid v Marc Sieber | 6-7,1-6 |
| ITF Turkey F2 | 2018/01/20 07:30 | Dimitar Kuzmanov v Marc Sieber | 6-1,4-6,7-5 |
| ITF Turkey F8 | 2018/02/27 07:30 | Ryan Nijboer v Ivan Davydov | 3-6,2-6 |
| ITF Turkey F8 | 2018/02/25 07:30 | Luca George Tatomir v Ivan Davydov | 1-6,2-6 |
| ITF Turkey F8 | 2018/02/24 09:30 | Keisuke Numajiri v Ivan Davydov | 1-6,7-6,5-7 |
| ITF Turkey F7 | 2018/02/20 11:30 | Joao Menezes v Ivan Davydov | 6-3,5-7,6-3 |
| ITF Turkey F7 | 2018/02/19 07:00 | Marat Deviatiarov v Ivan Davydov | 7-5,6-2 |
| ITF Turkey F7 | 2018/02/18 09:00 | Lukas Krainer v Ivan Davydov | 4-6,5-7 |
| ITF Turkey F7 | 2018/02/17 11:00 | Ivan Davydov v Dragos Nicolae Madaras | 3-6,6-4,6-4 |
| ITF France F3 Qual | 2018/01/20 09:00 | Ivan Davydov v Arthur Reymond | 1-6,4-6 |